Question: Given the digits {1, 2, 3, 4, 5}, how many 3-digit numbers can be formed if: No digit is repeated? The result must be even,

Given the digits {1, 2, 3, 4, 5}, how many 3-digit numbers can be formed if:

  1. No digit is repeated?
  2. The result must be even, and no digit is repeated?
  3. The number must contain at least 1 repeated digit?

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